Based on student responses, reteach concepts that students need extra help with. Then, allow them to practice a few problems on their own or in groups. Use the second page of the guided notes to model some examples with your students. Refer to the FAQ below for a walk through on this, as well as ideas on how to respond to common student questions. Walk through the key points of calculating the total surface area, including identifying the height and base of the triangle, and using the formula A = (1/2) * base * height for the lateral faces, and the formula A = base * height for the bases. ![]() Explain that the total surface area of a prism is the sum of the areas of all its faces, including the bases and the lateral faces. Walk through the key points of calculating the lateral surface area, including identifying the height and base of the triangle, and using the formula A = (1/2) * base * height.Ĭontinue using the first page of the guided notes to introduce the concept and formulas of lateral surface area vs. Emphasize that the lateral faces are the faces that are not the bases of the prism. Explain that the lateral surface area of a prism is the sum of the areas of all its lateral faces. Use the first page of the guided notes to introduce the concept of lateral surface area. Refer to the last page of the guided notes as well as the FAQs below for ideas. ![]() As a hook, ask students why calculating the lateral surface area and total surface area of triangular prisms is important in real life.
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